Browsing Centre for Atmospheric and Oceanic Sciences (CAOS) by Title
Now showing items 53-72 of 122
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Intense Rainfall Events over the West Coast of India
West coast of the Indian peninsula is one of the regions which receive very heavy rainfall during the summer monsoon season. Average June-September rainfall over the parts of coastal Karnataka, Konkan and Goa exceed 250 ... -
Interannual Variation of Monsoon in a High Resolution AGCM with Climatological SST Forcing
(2018-04-06)Interannual variation of Indian summer (June-September: JJAS) monsoon rainfall (ISMR) depends on its relative intensity during early (June-July: JJ; contribution 52%) and late (August-September: AS; contribution 49%) phases. ... -
Intraseasonal oscillations and interannual variability of the Indian summer monsoon
Several modeling studies show that the predictability of the seasonal mean Indian summer monsoon is limited due to a significant fraction of the interannual variability of the seasonal mean being governed by internal chaotic ... -
Intraseasonal Variability in Aquaplanet Configuration of Community Atmosphere Model
The Intraseasonal Oscillation (ISO) plays an important role to modulate deep convective activity in the tropical region. In this thesis, I aim to understand the role of land and warm oceans in ISO, using a general ... -
Intraseasonal Variability Of The Equatorial Indian Ocean Circulation
(Indian Institute Of Science, 2004-10)Climatological winds over the equatorial Indian Ocean (EqlO) are westerly most of the year. Twice a year, in April-May ("spring") and October-December ("fall"), strong, sustained westerly winds generate eastward equatorial ... -
Intraseasonal Variations In Sea Level Pressure And Association With Tropical Convection
(2010-07-19)This thesis deals with tropical intraseasonal variation (TISV) having time scales in 20-80 day range. Variations on this time scale have been observed to have profound influence on the weather and climate of the entire ... -
Investigating controls on intraseasonal convection and the abrupt seasonal transition in the boundary layer during monsoons
As solar insolation increases in the northern hemisphere during boreal summer, it is accompanied by an abrupt change in the circulation associated with the monsoons as well as heightened intraseasonal convective activity ... -
Investigation Of Aerosol Characteristics Over Inland, Coastal And Island Locations In India
(2011-02-10)This thesis is based on measurements of aerosol optical and microphysical properties made at inland, coastal and island locations in India. Aerosol vertical distribution measurements have also been made both using surface ... -
An investigation of the sensitivity of climate feedbacks to the latitudinal distribution of radiative forcing using the radiative kernel approach
It is well known that climate sensitivity, defined as the global mean surface temperature change per unit radiative forcing, depends on the forcing agents (such as CO2, CH4, O3, aerosols, solar radiation, land cover change, ... -
An Investigation On Role Of Surface Reflectance And Aerosol Model In Remote Sensing Of Aerosols From Moderate-Resolution Imaging Spectroradiometer Over India
(2010-07-21)The Moderate-resolution Imaging Spectroradiometer (MODIS) onboard NASA’s Terra and Aqua satellites have provided a global distribution of aerosols. The space-based inversion of MODIS measurements requires assumption about ... -
Investigation on the linkage between mystery of excess atmospheric absorption and state of mixing of aerosols
In order to understand the response of the Earth–atmosphere system to anthropogenic aerosol forcing, it’s essential to know the relative impact of the various aerosol species on the radiation budget. Most of the models ... -
Measurements And Modelling Of Internal Waves In The Northeastern Arabian Sea
(2010-08-30)Internal waves (IWs) owe their existence to the stratification in the medium. These waves affect acoustic transmission greatly. Impact of these waves on acoustic transmission in deep water is fairly well understood due ... -
Mesoscale Turbulence on the Ocean Surface from Satellite Altimetry
(2018-06-26)The dynamics captured in the ocean surface current data provided by satellite altimetry has been a subject of debate since the past decade. In particular, the contribution of surface and interior dynamics to altimetry ... -
A Method to Derive an Aerosol Composition from Downward Solar Spectral Fluxes at the Surface
(2018-01-01)Aerosol properties are highly variable in space and time which makes the aerosol study more complex. The sources and production mechanism of aerosols decide the properties of the aerosols. Aerosol radiative forcing is ... -
A model-based investigation of the long-term climate and carbon cycle consequences of fossil fuel emissions, land use changes and negative emissions
In this thesis, we investigate the effects of anthropogenic perturbations such as fossil fuel emissions, deforestation, afforestation and negative emissions on the long-term climate and carbon cycle using simulations from ... -
Modeling of Solar Radiation Management : A Comparison of Simulations using Reduced Solar Constant and Stratospheric Aerosols
(2017-11-22)The climatic effects of Solar Radiation Management (SRM) geoengineering have been often modeled by simply reducing the solar constant. This is most likely valid only for space sunshades and not for atmosphere and surface ... -
Moist and Dry Dynamics in Shallow Water and General Circulation Models
Various aspects of dry and moist atmospheric dynamics are explored through systems of varying complexity, ranging from a 2-D shallow water model to a more complex 3-D general circulation model. First, we examine the response ...